//
//  UserAccountViewModel.swift
//  Three-SinaWeibo
//
//  Created by 李旭阳 on 15/11/14.
//  Copyright © 2015年 apple. All rights reserved.
//

import UIKit
import AFNetworking

class UserAccountViewModel: NSObject {
    
    var account: UserAccount?
    var userLogin: Bool{
        return account?.access_token != nil
    }
    var token: String?{
        return account?.access_token
    }
    
    //用户头像
    var headURL: NSURL? {
        return NSURL(string: (account?.avatar_large ?? ""))
    }
    
    //获取用户账户
    override init() {
        account = UserAccount.loadAccount()
    }
    
    //MARK: 获取token
    func loadAccessToken(code: String, finished:(error: NSError?)->()){
        let urlString = "https://api.weibo.com/oauth2/access_token"
        let parameters = ["client_id": client_id,"client_secret":client_secret,"grant_type" : "authorization_code","code":code,"redirect_uri":redirect_uri]
        let AFN = AFHTTPSessionManager()
        //AFN 默认只支持以下几种数据格式的解析 @"application/json", @"text/json", @"text/javascript"
        AFN.responseSerializer.acceptableContentTypes?.insert("text/plain")
        AFN.POST(urlString, parameters: parameters, success: { (_, result) -> Void in
            if let dict = result as? [String: AnyObject]{
                //字典转模型
                let account = UserAccount(dict: dict)
                self.loadUserInfo(account, finished: finished)
            }
            }) { (_, error) -> Void in
                print(error)
        }
    }
    
    //MARK: 获取用户信息
    private func loadUserInfo(account: UserAccount,finished:(error: NSError?)->()){
        
        let urlString = "https://api.weibo.com/2/users/show.json"
        let parmaters = ["access_token": account.access_token!,"uid":account.uid!]
        let AFN = AFHTTPSessionManager()
        AFN.GET(urlString, parameters: parmaters, success: { (_, result) -> Void in
            if let dict = result as? [String:AnyObject]{
                account.avatar_large = dict["avatar_large"] as? String
                account.name = dict["name"] as? String
                account.saveAccount()
                finished(error: nil)
            }
            }) { (_, error) -> Void in
                finished(error: error)
                print(error)
        }
    }
}
